Electbic switch



C. D. R ND F. KOERNER.

E EC IC SWITCH.

APPLICATION FILED FEB. 10, 1917.

1 ,307,833. Patented June 919.

I [5. E I WITNESS I I/E/VTOH5 AZ A) 771 I EHJYEH 1L154 'a,u a M ATTORNEY C. D. RAY AND-F. KOERNER. ELECTRIC SWITCH. APPLICATION FILED FEB. I0. 1911.

1 ,307,833 Patented June 24, 1919.

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WITNESS INVENTORS 2 17. HA? I? 6- 7% c/ 1? KQEHNER BY 4. mwzaafi ATTORNEY CHARLES D. BAY AND FRED KQERNER, OF LE MARS, IOWA.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented June 24, 1919.

Application filed February 10, 1917. Serial No. 147,739.

To all whom it may concern:

Be it known that we, CHARLES D. RAY and FRED KOERNER, citizens of the United States, and residents of Le Mars, in the county of Plymouth and State of Iowa, have invented certain new and useful Improvements in Electric Switches, of which the following is aspecification.

The present invention relates to electrical switches.

Th invention has for its primary object the production of improved electrical switch ing mechanism for swinging closures.

Another object of the invention is the production of an improved electrical switching mechanism particularly adapted for use on swinging doors.

Another object of the invention is the production of mechanism adapted to be readily applied to the stem of a door knob to operate a pull switch when the knob is turned to open and close the door. I

A further object of the inventlon is the production of improved electrical switching mechanism for swinging closures inexpensive in production and readily applied to the usual door-knob-stem to control a switch.

IVith these and other objects in view, the invention consisting in the construction, combination and novel arrangement of parts will be fully understood from the following description reference being had to the accompanying drawings which form a part of this application and in which like characters of reference indicate corresponding parts throughout the several views, of which Figure 1 is a fragmentary elevation of a door equipped with the preferred embodiment of the invention to control an electrlc p;

Fig. 2 is a plan of the same;

Fig. 3 is an enlarged perspective view of the switch controlling arms;

Fig. a is a transverse section of one of the arms taken on the line 4+ of Fig. 3, and

Fig. 5 is a fragmentary elevation of a door equipped with a modification of the invention to actuate a door-bell or other audible signal by turning of the door-knob.

Although we have illustrated and hereinafter described two forms of the invention, it will be readily understood that the invention may be applied in a great many different forms without departing from the spirit and scope of the invention as defined in the appended claims.

Referring, now, to the illustrations, 6, represent a. door provided with a familiar form of lock, '7, including a lock bolt, 8, and a latch bolt, 9, controlled by the flat sided stem, 10 turned by the door knob, 11. On the stem 10, we mount lateral arms, 12, which are connected by flexible links with the switching mechanism. The arms, 12 are preferably formed integrally with each other and are disposed at an angle to each other. At their converging ends the arms are provided with a rectangular opening, 18 to receive the stem, 10.

Upon the door is mounted a familiar form of pull switch 14, having a retracting pull cord, 15, which being successively pulled, accordingly closes and opens the contacts of the switch, 141. The switch, 14 is connected in series with an electric lamp, 16 and a snap switch, 17 in a circuit, 18 which, it will be assumed, leads from a source of current.

The pull cord, 15 is of the beaded type and is provided with diverging strands, 19, connected to the arms, 12. In order to adjustably secure the links, 19, to the controlling arms, we provide strips, 20, which rest upon the arms and are pivoted at one end as at 21, to the arms. Adjacent their free ends, the strips are provided with transverse notches, 22, to receive screws, 23, threaded into the arms, 12 and the heads of which normally engage the strips to prevent relative movementbetween the strips and arms. The free ends of the strips have bifurcated portions, 241, bent at an angle to the plane of the arms and adapted to engage the strands, 19, at any desired point between the beads thereof.

It will thus be seen that when desired, the screws 23, may be loosened to adjust the strips, 20, in order to equalize or alter the tension on the strands, 19. It is now evi dent that when the door-knob is turned to open the door that one of the links 19, will be slackened and the other (according as the direction of turning of the knob) will coact with the cord, 15 to close the switch and thereby light the light 16. Then, when the knob is turned to close the door, one or the other of the links, 19, operates the switch to put out the light. When it is desired to render the device inoperative, the links, 19, may be disconnected from the arms or the switch, 17, may be turned to open the circuit.

In order to prevent turning of the door knob, when the door is locked, We mount on the lock bolt, 8, a lateral arm, 25, which is engageable with a stud, 26, on the latch bolt, when the lock-boltis in the position indicated by dotted lines in Fig. 1.

The modification presented in Fig. 5 consists of a vibrating electric bell, 27, having one terminal connected by a conductor 28, with a contact screw, 29, extending through a post, 30, mounted on a base, 31, having pivoted thereon an arm, 32. To the said arm and the other terminal of the hell are connected conductors 33 and 34:, respectively which, we will assume, are connected with a source of current. The free end of the arm, 32, carries a contact spring, 35, adapted to contact with the terminal, 29. The spring, 35, is retracted and held normally out of engagement with the terminal, 29, by means of a spring, 36, secured to the arm 32, and a clip, 3? on the base.

Secured to the arm is a link, 38, terminating in diverging flexible strands, 39, secured to the arms, 12, mounted on thestem of the door knob. It will be seen that when the door knob is turned in either direction, the

bell, 27, is actuated by engagement of the contact spring, 35, with the contact member, 29.

This switching-device is particularly use- 111 in telephone, toilet and other inclosures where automatic means are desirable for controlhng the lights.

Having thus described our invention,

what we claim as new and desire to secure by Letters Patent of the United States, is

l. The combination with a swinging closure having a latch-bolt and a flat-sided turning stem for controlling the latch-bolt, of a pair of integral arms disposed in different directions and having at their junction a fiat-side opening to receive the stem, members adjustable transversely of the arms, a device having a retracting part to open and close an electrical circuit, and flexible links between said members and said part.

2. In an electrical switch-operating device for a swinging closure having a latchcontrolling stem, comprising a pair of members adapted to be mounted radially on the stem and at an angle to each other, an electrical switch having a retracting part to open and close an electrical 'switch, and links between said members and said part.

In testimony whereof we have hereunto set 7on1 hands this 6th day of February, 191

CHARLES D. RAY. FRED KOERNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

